const MD5 = require('./md5.min.js'); 

/**
 * javascript实现PHP字典排序
 * @param {Object} vm 当前this
 * @param {Array} inputArr 规定要进行排序的数组
 * @param {String} sort_flags 规定如何排列数组的元素/项目
 */
export function ksort(vm, inputArr, sort_flags) {
  var tmp_arr = {},
    keys = [],
    sorter, i, k, that = vm,
    strictForIn = false,
    populateArr = {};

  switch (sort_flags) {
    case 'SORT_STRING':
      // compare items as strings
      sorter = function (a, b) {
        return that.strnatcmp(a, b);
      };
      break;
    case 'SORT_LOCALE_STRING':
      // compare items as strings, original by the current locale (set with  i18n_loc_set_default() as of PHP6)
      var loc = vm.i18n_loc_get_default();
      sorter = vm.php_js.i18nLocales[loc].sorting;
      break;
    case 'SORT_NUMERIC':
      // compare items numerically
      sorter = function (a, b) {
        return ((a + 0) - (b + 0));
      };
      break;
    // case 'SORT_REGULAR': // compare items normally (don't change types)
    default:
      sorter = function (a, b) {
        var aFloat = parseFloat(a),
          bFloat = parseFloat(b),
          aNumeric = aFloat + '' === a,
          bNumeric = bFloat + '' === b;
        if (aNumeric && bNumeric) {
          return aFloat > bFloat ? 1 : aFloat < bFloat ? -1 : 0;
        } else if (aNumeric && !bNumeric) {
          return 1;
        } else if (!aNumeric && bNumeric) {
          return -1;
        }
        return a > b ? 1 : a < b ? -1 : 0;
      };
      break;
  }

  // Make a list of key names
  for (k in inputArr) {
    if (inputArr.hasOwnProperty(k)) {
      keys.push(k);
    }
  }
  keys.sort(sorter);
  // BEGIN REDUNDANT
  vm.php_js = vm.php_js || {};
  vm.php_js.ini = vm.php_js.ini || {};

  // END REDUNDANT
  strictForIn = vm.php_js.ini['phpjs.strictForIn'] && vm.php_js.ini['phpjs.strictForIn'].local_value && vm.php_js
    .ini['phpjs.strictForIn'].local_value !== 'off';
  populateArr = strictForIn ? inputArr : populateArr;

  // Rebuild array with sorted key names
  for (i = 0; i < keys.length; i++) {
    k = keys[i];
    tmp_arr[k] = inputArr[k];
    if (strictForIn) {
      delete inputArr[k];
    }
  }
  for (i in tmp_arr) {
    if (tmp_arr.hasOwnProperty(i)) {
      populateArr[i] = tmp_arr[i];
    }
  }

  return strictForIn || populateArr;
}

// 签名算法
const createSign = (vm, params) => {

  let data = params ? params : {}
    let aa = ksort(vm, data)
    let bb = ''

    // 拼接url键值对
    Object.keys(aa).forEach((key, i) => {
      if(aa[key] !== '') {
        bb += key + '=' + encodeURIComponent(aa[key]) + '&'
      }
    })

    // 拼接app_key
    let cc = `${bb}app_secret=${params.app_secret}`

    // MD5运算
    let dd = MD5(cc)

    let ee = dd.toUpperCase()

    data.sign = ee
    return data
}

// 使用
createSign(this, data)